Voices from all walks of life

I finally ordered the book + DVD Colligan-Taylor, Karen. Living Japanese: Diversity in Language and Lifestyle. An article on this work I found introduces it in these words :

Living Japanese:Diversity in Language and Lifestyles (DVD/text package) is
an excellent tool for intermediate to advanced students who want to improve
their listening comprehension skills in contemporary Japanese as it is spoken by
native speakers.Most of the existing audio or audiovisual language teaching mate-
rials offer rehearsed speeches by one or two professional speakers scripted by
foreign language educators.Accordingly,they sound very clear,smooth,and gram-
matically correct and are easy to understand; however, they are different from
“real” Japanese. By contrast, the DVD in Living Japanese offers unscripted and
unrehearsed speaking by 33 native speakers of Japanese, aged seven to seventy-
five, who are not professional speakers, actors, or actresses, but, rather, people
from all walks of life and from different geographic areas in Japan.

Indeed, I crave for people's voices from all walks of life. The strategy to deploy in order to gather a collection of voices for interpreting training from Japanese to you-name-it language would be to record hours of TV and pick up morsels out of it. But to what extend are voices from all walks of life available on TV? Maybe the focus should be on documentaries only. Formatted news and journalistic voices are available on podcast, but what about non-media people's voices? I am dreaming of walking around talking to people and record their voices, but the feasibility of this may rate low. This book + DVD may provide some hint on how to foray into this audio realm. There must be stocks of thematic interviewing of Japanese people, but where to find them?